High latitudes (Tasmania, Southern New Zealand, Australian
Antarctic Territories) should be on the lookout tomorrow and the day after
(Friday 19 and possibly Saturday 20th). Although high latitudes are the best
bet, the last two auroral shows were seen in Victoria and WA, so keep an eye
peeled. Aurora can strike any time, look to the south for unusual glows,
shifting glows or pillars of light. Some idea of the sorts of things it might be
possible to see is http://astroblogger.blogspot.com.au/2013/07/images-from-saturday-nights-aurora.html

However,
the waxing moon will significantly interfere with seeing any aurora in the
evening, and dark sky sites have the best chance of seeing anything. The weather
is not entirely favourable either.